JP7282501B2 - Adapter with LC type 2-core shutter - Google Patents

Description

The present invention relates to an adapter with an LC-type twin-fiber shutter for interconnecting a pair of opposing LC-type optical connector plugs.

20, 21 and 22, conventionally, a dedicated device for ultrasonic welding has been used for assembling the adapter Q with the LC type twin-core shutter. After the shutter plate 104 is pushed away by the coupling sleeve G surrounding the ferrule F of the plug P, the ferrule F is fitted to the sleeve holder 106 inside the adapter Q. As shown in FIG. At this time, the operating lever 105 is automatically pushed down by the inclined surface of the adapter Q as the plug is inserted. The adapter Q shown in FIG. 22 is formed into a rectangular cylindrical body by attaching a bottom plate 100c to an adapter housing 103 having a downward opening and a door surface portion 102 with an inclined front surface by welding using the above-mentioned dedicated device. be done.

On the other hand, in the adapter Q shown in FIG. 21, the adapter housing 103 is formed by integrating the upper wall 100a and the left and right side walls 100b. As a whole, a rectangular cylindrical body having fitting portions A and B at both ends that allow a pair of opposing LC type optical connector plugs P and P to be inserted into each other from both ends by being attached between the side walls 100b of the formed. A rectangular cylindrical holder 101 is mounted on the front side of the adapter Q for mounting the bottom wall 100c on the open bottom side of the adapter housing 103 and fixing it to the left and right side walls 100b.

As for the adapter with LC-type 2-core shutter, for example, as shown in Patent Document 1, a recess for receiving the tip of a ferrule inserted obliquely upward from before fitting into the shutter plate without contact. and the shutter plate accepts the tip of the ferrule in a non-contact state by the escape, and at the same time pushes the shutter plate open by the tip opening edge of the coupling sleeve provided so as to cover the periphery of the ferrule. An adapter with built-in dustproof shutter for an LC type optical connector is known.

In addition, as shown in Patent Document 2, in order to prevent serious injury to the body, especially the eyes, of a worker when inserting an LC-type optical connector plug having various uneven shapes, The inside of the side wall of the connector housing has a guide groove for guiding the insertion of the LC type optical connector plug from the fitting portion, and a recessed portion adapted to the rocking motion of the shutter plate. An adapter for interconnecting LC-type optical connectors is known in which a part of the guide groove is notched so as to form a coplanar shape.

Furthermore, as shown in Patent Document 3, the side surface of the movable portion of the shutter plate (the side surface including the notch on the upper shoulder side and the protrusions on the left and right sides of the lower portion) swings in the opening direction (downward). , On both left and right sides of the upper part of the shutter plate (left and right shoulder sides through the upper center protrusion), cutouts are formed so as to be continuous with the upper center protrusion, so that the shutter plate can be rotated to the open side. Sometimes contact with the latch strip is avoided. That is, since the notches of the shutter plate pass through the roots of the latch pieces provided oppositely on both sides inside the connector housing when the shutter plate is rotated to the open side, even if the overall length of the adapter body is short, the shutter plate can be An adapter with a shutter for an MU-type optical connector is known in which the shutter plate itself does not interfere with the latch piece when it is rotated to the open side.

JP 2015-059941 A JP 2014-139633 A JP 2015-219346 A

However, since the conventional adapter Q with an LC-type twin-core shutter described above uses ultrasonic welding in its assembly, it requires a dedicated device. In particular, the direction of the adapter Q is restricted when receiving it in a cassette or the like.

In the adapter Q shown in FIG. 22, since the bottom plate 100c is attached by welding to the adapter housing 103 having a lower opening, there is a risk that the bottom plate 100c will peel off due to deterioration over time or contact with other adjacent adapters. rice field.

Further, in Patent Document 1 described above, the shutter plate is pushed aside and opened by the tip opening edge of the coupling sleeve provided so as to cover the periphery of the ferrule. There is a risk that the ends of the sleeve holder will come into contact with each other due to the dimensional error of the shutter plate. Moreover, in the conventional art, the protrusions for supporting the lower part of the shutter plate are positioned in front of the housing, and the thickness of the protrusion holding portion at the front end is small and fragile. There is a problem that the interference portion becomes large, the guide performance is lowered, and the bending load resistance of the fitted plug becomes small.

Moreover, in the case of Patent Document 2, the sleeve holder, in particular, has a vertical end face formed with an opening into which the tip of the ferrule is inserted. there were.

Furthermore, in the case of Patent Document 3, notches provided on both sides of the upper end of the shutter plate prevent contact with latch pieces provided on both sides inside the connector housing (adapter housing) when the shutter plate rotates to open. Therefore, when the shutter plate is rotated to close, a gap is likely to occur between the shutter plate and the connector housing, which may lead to leakage of light and contamination of dust and the like.

Accordingly, the present invention has been devised in view of the conventional circumstances as described above. By adopting a slide lock structure when assembling the adapter with shutter, the adapter can be easily attached to the cassette. There is no need to provide restrictions on the direction, there is no danger that the sleeve holder will come into contact with the shutter when the shutter plate is opened, and furthermore, the tightness between the inside of the adapter housing and the shutter, and the guiding performance and holding strength of the shutter itself can be improved. Also, it is an object of the present invention to provide an adapter with an LC-type two-core shutter that can accommodate an LC-type optical connector plug compactly.

In order to solve the above problems, in the present invention, a two-core shutter with a slide lock structure is assembled by combining the upper lid housing 1 and the lower lid housing 30 via the sleeve holder 20 located in the middle. Adapter Q,
The upper cover housing 1 is a cylindrical body formed by an upper wall 1A, a left side wall 1B , a right side wall 1C, and a holding wall 2b at the lower end of the front portion. has a pair of left and right openings 2 into which is inserted, and depressions 7 are formed inside the left side wall 1B and the right side wall 1C forming the pair of left and right openings 2 and on both sides of the central partition wall 1D, and these depressions It is held by a leaf spring 8 so as to rotate along the portion 7 from the oblique closed state in front of the pair of left and right openings 2 to the open state in the horizontal position behind the pair of left and right openings 2. a shutter plate 3 is arranged in each of the pair of left and right openings 2;
Locking walls for locking the shutter plates 3 are provided in front of the pair of left and right openings 2 on the side facing the left side wall 1B and the central partition wall 1D, and on the side facing the right side wall 1C and the central partition wall 1D. A pair of 7A are provided facing each other in the pair of left and right openings 2,
A through hole 13 is provided in the holding wall 2b at the lower end of the front portion forming the lower side of the pair of left and right openings 2, and the left side wall 1B and the right side wall 1C of the pair of left and right openings 2 are engaged with the outer surface rearward thereof. Each stop projection 4 is provided,
A flat plate 5 is protruded from the upper rear end of the upper wall 1A, and an arm 6 protruding rearward from the center of the upper surface of the flat plate 5 and having a downward engaging portion 6A formed at the tip,
On the other hand, the lower cover housing 30 is fitted into the through hole 13 of the holding wall 2b so as to protrude forward at the lower position facing the holding wall 2b at the front lower end of the upper cover housing 1. A central partition wall 33 having a bottom plate portion 32 with a projection 31 formed at its tip, a left side wall 34 and a right side wall 34 having receiving portions 33a formed on both left and right sides slightly below the upper end of the bottom plate portion 32, extending behind the bottom plate portion 32. , and the arm 6 protruding to the upper central rear portion of the upper lid housing 1 is locked above the rear end of the central partition wall 33 via a locking portion 6A at the lower end of the arm . forming a locking recess 35;
Engagement hole portions engaged with engagement protrusions 4 respectively formed in front of the left side wall 34 and right side wall 34A of the lower lid housing 30 and behind the outer surface of the left side wall 1B and right side wall 1C of the upper lid housing 1. forming a support plate portion 36 provided with 36A,
On the upper end of the left side wall 34 of the lower lid housing 30 and the upper surface of the receiving portion 33a projecting on the left side of the central partition wall 33, and on the upper end of the right side wall 34A and the upper surface of the receiving portion 33a provided on the right side of the central partition wall 33, the above-mentioned A pair of cover bodies 39 are arranged in parallel via a plurality of leg portions 33b so as to cover the rear end portion of the upper surface of each receiving portion 33a from above,
The end surface of the sleeve holder 20 is formed into a downward inclined surface 26 from the upper side to the lower side so that the upper side of the shutter plate 3 does not contact the sleeve holder 20 when the shutter plate 3 is opened and closed. become,
The shutter plate 3 is formed with notches 10 on the left and right upper sides thereof, and L-shaped ridges 3a protrude from the edges of the notch parts 10 on the left and right sides.
Therefore, in the closed state of the shutter plates 3, the ridges 3a are positioned on the inner side of the left side wall 1B in front of the pair of left and right openings 2 of the upper lid housing 1 and on the opposite side and the right side of the central partition wall 1D. It is characterized in that the leaf springs 8 are held in contact with the rear edges of the locking walls 7A projecting from the inner side of the wall 1C and the opposite side of the central partition wall 1D.

According to the present invention, by adopting a slide lock type structure for assembling the adapter with the shutter, there is no need to limit the direction of the adapter when it is attached to the cassette. LC-type 2-core which has no risk of contacting with the shutter at times, has improved airtightness between the inside of the adapter housing and the shutter, has improved guiding performance and holding strength of the shutter itself, and can accommodate the LC-type optical connector plug compactly. An adapter with a shutter can be provided, which allows building a security system for various optical connector plugs.

Namely, this comprises an upper lid housing provided with locking projections on left and right wall surfaces and an arm on the upper wall surface, a shutter plate arranged in an upright direction on the opening side of the upper lid housing, a sleeve holder containing a split sleeve, a lower lid housing having, on its left and right wall surfaces, engaging holes for engaging the engaging projections and having engaging recesses for engaging the arms on its upper wall surface; and the upper lid housing and the lower lid sandwiching the sleeve holder. Since the housing is connected by the engagement between the arm and the locking recess, and the locking projection and the locked hole, this sliding lock type connection structure allows the LC type to be easily assembled at low cost. An adapter with a 2-core shutter can be provided, eliminating the need for dedicated equipment such as an ultrasonic welder.

Further, the end surface of the sleeve holder is formed into a downwardly inclined surface from the upper side to the lower side so that the upper side of the shutter plate does not come into contact with the sleeve holder when the shutter plate is opened and closed. The shutter plate can be stored compactly in the adapter housing.

The shutter plate has L-shaped projections protruding from the edges of cutouts formed on the left and right upper sides of the shutter plate. A plate spring abuts and holds a locking wall protruding on the opposite side of the central partition, and on the inner side of the right side wall and the opposite side of the central partition, to hold the locking walls in the pair of left and right openings of the upper cover housing. Therefore, the stopper function of the shutter plate with respect to the locking wall works strongly, preventing light from leaking and remarkably improving the airtightness of the pair of left and right openings.

It is an exploded perspective view showing one form for carrying out the present invention. The upper lid housing is shown, (a) is a plan view, (b) is a side view, (c) is a bottom view, (d) is a front view, (e) is a rear view, and (f) is a perspective view. The lower lid housing is shown, (a) is a plan view, (b) is a side view, (c) is a bottom view, (d) is a front view, (e) is a rear view, and (f) is a perspective view. The state after assembly is shown, (a) is a plan view, (b) is a side view, (c) is a bottom view, (d) is a front view, and (e) is a rear view. After assembly, (a) is a perspective view when viewed obliquely from the front, (b) is a perspective view when viewed obliquely from the rear, and (c) is AA in FIG. 4E. 4(d) is a cross-sectional view taken along the line BB of FIG. 4(e). It shows a state after assembly with left and right latches attached, (a) is a plan view, (b) is a side view, (c) is a bottom view, (d) is a front view, and (e) is a rear view. . It shows a state after assembly with left and right latches attached, (a) is a perspective view seen obliquely from the front, and (b) is a perspective view seen obliquely from the rear. FIG. 4 is a perspective view showing a state in which a main part of the opening is seen obliquely from the front; 6(a) is a CC cross-sectional view of FIG. 6(e), (b) is a DD cross-sectional view of FIG. 6(e), and (c) is FIG. 6(e). is a cross-sectional view of EE. Left and right latches are shown, (a) is a plan view, (b) is a side view, (c) is a bottom view, (d) is a front view, (e) is a rear view, and (f) is a perspective view. . 1 shows upper and lower latches, (a) is a plan view, (b) is a side view, (c) is a bottom view, (d) is a front view, (e) is a rear view, and (f) is a perspective view. . 1 shows a cylinder that is a constituent member of the sleeve holder, (a) is a plan view, (b) is a side view, (c) is a bottom view, (d) is a front view, (e) is a rear view, and (f). is a perspective view seen obliquely from the front, and (g) is a perspective view seen obliquely from the rear. (a) is a plan view, (b) is a side view, (c) is a bottom view, (d) is a front view, (e) is a rear view, and (f) is a diagonal front view. and (g) is a perspective view seen obliquely from the rear. A metal spring is shown, (a) is a plan view, (b) is a side view, (c) is a bottom view, (d) is a front view, (e) is a rear view, and (f) is a perspective view from diagonally forward. FIG. (g) is a perspective view seen obliquely from the rear. (a) is a plan view showing a state in which the adapter is attached to the attachment plate by upper and lower latches. (b) is a side view. (a) is a plan view showing a state in which the adapter is attached to the attachment plate by upper and lower latches. (b) is a side view. An adapter in which three LC-type 2-cores are mounted side by side, (a) is a plan view, (b) is a front view, (c) is a cross-sectional view of EE of (a), and (d) is a perspective view. It is a diagram. It is sectional drawing which shows the example of attachment of the shutter plate between a conventional example and this embodiment, Comprising: (a) is sectional drawing of a conventional example, (b) is sectional drawing of this embodiment. It is sectional drawing which inserted the plug in the adapter in this embodiment. It is sectional drawing which inserted the plug in the adapter in a conventional example. An adapter in a conventional example is shown, (a) is an exploded perspective view, and (b) is a perspective view after assembly. An adapter in a conventional example is shown, (a) is an exploded perspective view, and (b) is a perspective view after assembly.

An embodiment of an adapter with an LC-type twin-fiber shutter (hereinafter referred to as "adapter Q") according to the present invention will be described in detail below with reference to the drawings.

As shown in FIGS. 1 to 9, the adapter Q according to this embodiment has an assembly mechanism with a slide lock structure in which the upper lid housing 1 and the lower lid housing 30 are combined via an intermediate sleeve holder 20. ing.

As shown in FIGS. 1 to 9, the top cover housing 1 is a cylindrical body formed by a top wall 1A, a left side wall 1B , a right side wall 1C, and a retaining wall 2b at the lower end of the front portion, and has a central partition wall 1D inside. It has a pair of left and right openings 2 into which two optical connector plugs P (shown in FIGS. 19 and 20) can be inserted from the tip.

That is, as shown in FIGS. 1 and 2, the upper lid housing 1 includes a pair of left and right openings 2, a shutter plate 3 erected inside each of the openings 2, a left side wall 1B and a right side wall 1C. a locking protrusion 4 engaged with a locked hole 36A on the side surface of the lower lid housing 30, a flat plate 5 protruding rearward from slightly below the upper wall 1A, and the lower lid housing 30. and an arm 6 protruding rearward from the center of the flat plate 5 and having a locking portion 6A at its tip so as to engage with a locking recess 35 provided in the center of the rear portion. Three through holes 13 are provided in the holding wall 2b at the lower end of the front portion of the upper lid housing 1, and three fitting projections 31 formed at the tip of the bottom plate portion 32 of the lower lid housing 30 can be fitted. It is

As shown in FIGS. 1, 5(d), 8 and 9(b), the shutter plates 3 are provided on the left side wall 1B and the right side wall 1C forming both openings 2 on the front surface of the upper lid housing 1. Depressions 7 are formed on both sides of the inner side and the central partition 1D, and along these depressions 7, a metal plate spring 8 is used to support the lid so as to shift from the oblique closed state to the horizontal open state. It is

A projection 9 formed on the lower side of one shutter plate 3 and communicating with the right and left is passed through a through hole 9A passing through the left side wall 1B and the lower part of the central partition 1D inside the one opening 2. A projection 9 formed on the lower side of the other shutter plate 3 and communicating with the right and left is passed through a through hole 9A passing through the central partition 1D and the lower part of the right side wall 1C inside the other opening 2, thereby Both shutter plates 3, 3 are arranged in both openings 2, 2 as a left and right pair via a central partition wall 1D. These shutter plates 3 are elastically held so as to always stand up by metal plate springs 8 rounded on the outside of projections 9 arranged on the underside thereof.

Further, as shown in FIGS. 1, 8 and 14, the shutter plate 3 is formed with notches 10 on the left and right upper sides thereof when the shutter plate 3 is closed. , an L-shaped ridge portion 3a protrudes.

That is, the L-shaped ridge 3a of the notch 10 is formed between the inner side of the left side wall 1B in the vicinity of the pair of left and right openings 2 of the upper lid housing 1 and the opposite side of the central partition wall 1D, and the inner side of the right side wall 1C and the above-mentioned Two pairs of locking walls 7A, 7A, 7A, 7A protrude from the opposite sides of the central partition wall 1D (each pair is opposed in the pair of left and right openings 2, 2 as clearly shown in FIG. 8). The plate spring 8 obliquely abuts and holds the rear end edge of each opening 2 rearward of each opening 2, and closes both openings 2 in a highly airtight state. It is designed to

In the figure, reference numeral 27 denotes a sleeve holder, which will be described later, inside the left side wall 1B and the right side wall 1C of the upper lid housing 1 in order to improve the insertability of the plug P (reduce the interference portion when the shutter 3 rotates and improve the guiding performance). 20 is a rectangular protrusion provided above.

9(b) and 18(b), the holding portion 2a for holding the projection 9 at the lower end of the shutter plate 3 at the lower end of the upper lid housing 1 is positioned behind the opening 2 of the upper lid housing 1. Because of this position, the thickness in the front-rear direction of the holding wall 2b provided below the front end of the upper lid housing is increased. By doing so, the strength of the mounting portion of the shutter plate 3 is improved, the height of the shutter plate 3 can be lowered, and furthermore the dropout of the shutter plate 3 is prevented. A relief portion 11 formed in a rectangular shape or the like is provided approximately at the center of the front surface of the shutter plate 3, and the middle portion of the relief portion 11 is formed of a thin plate having translucency.

As shown in FIG. 14, the plate spring 8 is provided with a transmitting portion 12 for transmitting part of the light at its center for holding the shutter plate 3 upright. That is, the leaf spring 8 is formed in a U shape so that the lower portion 8A of the leaf spring 8 rounds the protrusion 9 on the lower side of the shutter plate 3 from the outside, and the upper portion 8B thereof is curved in the opposite direction. . A U-shaped transmission hole 12a corresponding to the relief portion 11 is formed from the center of the upper end portion of the upper portion 8B curved in the opposite direction. Therefore, the light passes through the transmission hole 12a and hits the relief portion 11 formed in the thin plate in the middle, so that the light can be seen from the front side. In the present embodiment, the transmission part 12 is formed as a U-shaped transmission hole 12a, but it may be formed as a transmission hole 12a having another shape, for example, a round hole.

The sleeve holder 20 is, as shown in FIGS. A portion 22 and a rear holder portion 24 having two other cylinders 23, 23 on the rear surface side are joined together via two split sleeves 25, 25 at the center. At both ends of the sleeve holder 20, that is, at the ends of the cylinders 21, 21 on the front side and the cylinders 23, 23 on the rear side, downward inclined surfaces 26, 26 are formed downward from the upper side. The downward inclined surface 26 may be formed only at one end of the sleeve holder 20 depending on the usage conditions.

The lower lid housing 30 includes a bottom plate portion 32 whose lower side is aligned with the three through holes 13 arranged in the holding wall 2b at the front lower end of the upper lid housing 1, a central partition wall 33 and a left side wall 34 provided on the upper side of the rear portion. A locking recess 35 is formed on the rear end upper side of the central partition wall 33 so that the arm 6 provided at the center of the upper rear portion of the upper lid housing 1 is locked via the locking portion 6A at the lower tip end. I have.

As shown in FIG. 1, the left side wall 34 and the right side wall 34A of the lower lid housing 30 are formed with supporting plate portions 36 facing forward, respectively. A portion 36A is provided, and the locked hole portion 36A engages with the locking projections 4 projecting from the rear portions of the left side wall 1B and the right side wall 1C of the upper lid housing 1, respectively.

In addition, the upper end of the left side wall 34 and the upper surface of a receiving portion 33a projecting slightly below the upper end of the central partition wall 33 to the left, and the upper end of the right side wall 34A and the upper end of the central partitioning wall 33 projecting slightly below the upper right side of the central partition wall 33. A pair of cover bodies 39 are arranged in parallel via a plurality of leg portions 33b on the upper surface of the receiving portion 33a so as to cover the rear end portions thereof from above. Locking protrusions 37 are inserted into locking holes 38 at both ends of the right and left latches 40 to fix them at symmetrical positions (the upper surface of each cover body 39 and the lower surface of the bottom plate portion 32 of the lower lid housing 30). formed. A flange portion 28 is provided at the rear end of the lower lid housing 30 .

As shown in FIG. 10, the left and right latches 40 are of two identical constructions for covering the left lateral side and the right lateral side of the lower lid housing 30. As shown in FIG. That is, the left and right latches 40 have a front U-shaped frame shape having a long trunk portion 41 for covering the lateral side and short side portions 42 covering the upper and lower halves. It has three pieces 41A, 41B, and 41C whose tips are bent in a V-shape from the end, and one piece 42A each whose tip is bent in a V-shape from the end of the short side portion 42. ing.

On the other hand, instead of the left and right latches 40, as shown in FIG. 11, upper and lower latches 50 can be formed switchably as required. That is, the upper and lower latches 50 have nothing on the end of the long body 51, and two pieces 52A and 52B, each of which is bent in a V shape from the end of the short side 52. I have. The trunk portion 41 of the left and right latches 40 and the trunk portion 51 of the upper and lower latches 50 are prevented from coming off by a flange portion 28 provided at the rear end of the lower lid housing 30 . Both the left and right latches 40 and the upper and lower latches 50 are made of a spring material such as metal.

In short, as shown in FIG. 18(a), in the adapter Q according to the present invention, the holding wall 2b of the holding portion 2a positioned at the front end of the projection 9 of the shutter plate 3 has a thin thickness C and is closed. Sometimes it comes to a long A width position. On the other hand, in the present embodiment, as shown in FIG. 18(b), the holding portion 2a holding the protrusion 9 is retracted to have a width D larger than the thickness C and a length B when closed. in the width position. That is, in the conventional art, the interval A is long and the interval C is small. In contrast, in the present embodiment, the interval B is short. However, since the downward inclined surface 26 having the width E shown in FIG. The bending load resistance of the plug P can be increased, and the overall size of the adapter can be reduced.

Thus, the tip of the plug P is inserted toward the shutter plate 3 of the opening 2 of the adapter Q as shown in FIG. At this time, as described above, the operating lever 70 is automatically pushed downward to insert the plug P, thereby tilting the shutter plate 3 horizontally. Then, since one of the cylinders 21, 21 does not exist on the arc locus of the shutter plate 3 (that is, because there is a downward inclined surface 26), the shutter plate 3 can be smoothly opened without coming into contact with the sleeve holder 20. be done.

Also, when the adapter Q is not used, light is transmitted from behind through the escape portion 11 of the closed shutter plate 3, so that part of the light can be seen from the front side. Therefore, whether or not the mating plug P is inserted from the rear of the adapter Q can be immediately determined.

Next, an example of the operation of using the form configured as described above will be described.
When using this embodiment, first, the adapter Q is attached to the attachment plate 53 as shown in FIG. At this time, the longer piece 52B of the two pieces 52A and 52B of the upper and lower latches 50 on the lower lid housing 30 is crushed and accommodated in the opening 53A of the mounting plate 53. As shown in FIG. The shorter segment 52A is elastically held in front of the opening 53A of the mounting plate 53. As shown in FIG.

On the other hand, as shown in FIG. 16, of the three segments 41A, 41B, and 41C of the left and right latches 40 on the lower lid housing 30, the longer segments 41A and 41C and the upper and lower segments 42A are crushed to form the attachment plate. It fits in the opening 53A of 53. The shorter segment 41B is elastically held in front of the opening 53A of the mounting plate 53. As shown in FIG.

Also, as shown in FIG. 17, when three 2-core adapters Q are arranged, the three adapters Q are first inserted into the opening 61 of the casing 60 together. At this time, two small holes 62 are provided on both upper and lower surfaces of the casing 60 near the opening 61, and the shorter pieces 52A of the left and right latches 50 are engaged with these. Thus, the three adapters Q are attached to the casing 60 in parallel. In FIG. 17(c), 3 denotes a shutter plate, and 20 denotes a sleeve holder provided with downward inclined surfaces at both ends.

Q Adapter 1 Upper lid housing 1A Upper wall
1B Left side wall
1C right wall
1D Central partition 2 Opening 2a Holding portion 2b Holding wall 3 Shutter plate 3a Ridge 4 Locking projection 5 Flat plate 6 Arm 6A Locking portion 7 Recess 7A Locking wall 8 Leaf spring 8A Lower portion 8B Upper portion 9 Projection 9A Through hole 10 Notch 11 Relief 12 Transmitting part 12a Through hole 13 Through hole 20 Sleeve holder 21 One cylinder 22 Front holder part 23 The other cylinder 24 Rear holder part 25 Split sleeve 26 Downward inclined surface 27 Square protrusion 28 flange portion 30 lower lid housing 31 fitting projection 32 bottom plate portion 33 central partition wall 33a receiving portion 33b leg portion 34 left side wall
34A right wall
35 locking recess 36 support plate 36A locking hole 37 locking projection 38 locking hole 39 cover body 40 left and right latch 41 trunk 42 side 41A, 41B, 41C piece 42A piece 50 upper and lower latch 51 trunk 52 side Parts 52A, 52B Section 53 Plate 53A Opening 60 Casing 61 Opening 62 Small hole 70 Operation lever 100a Upper wall 100b Side wall 100c Bottom wall P Plugs A, B Fitting part 101 Holder 102 Door surface part 103 Adapter housing 104 Shutter plate 105 Operation Lever 106 Sleeve holder F Ferrule G Coupling sleeve

Claims (1)

An adapter Q with a two-core shutter having a slide lock type structure assembled by combining an upper lid housing 1 and a lower lid housing 30 via a sleeve holder 20 located in the middle,
The upper cover housing 1 is a cylindrical body formed by an upper wall 1A, a left side wall 1B , a right side wall 1C, and a holding wall 2b at the lower end of the front portion. has a pair of left and right openings 2 into which is inserted, and depressions 7 are formed inside the left side wall 1B and the right side wall 1C forming the pair of left and right openings 2 and on both sides of the central partition wall 1D, and these depressions It is held by a leaf spring 8 so as to rotate along the portion 7 from the oblique closed state in front of the pair of left and right openings 2 to the open state in the horizontal position behind the pair of left and right openings 2. a shutter plate 3 is arranged in each of the pair of left and right openings 2;
Locking walls for locking the shutter plates 3 are provided in front of the pair of left and right openings 2 on the side facing the left side wall 1B and the central partition wall 1D, and on the side facing the right side wall 1C and the central partition wall 1D. A pair of 7A are provided facing each other in the pair of left and right openings 2,
A through hole 13 is provided in the holding wall 2b at the lower end of the front portion forming the lower side of the pair of left and right openings 2, and the left side wall 1B and the right side wall 1C of the pair of left and right openings 2 are engaged with the outer surface rearward thereof. Each stop projection 4 is provided,
A flat plate 5 is protruded from the upper rear end of the upper wall 1A, and an arm 6 protruding rearward from the center of the upper surface of the flat plate 5 and having a downward engaging portion 6A formed at the tip,
On the other hand, the lower cover housing 30 is fitted into the through hole 13 of the holding wall 2b so as to protrude forward at the lower position facing the holding wall 2b at the front lower end of the upper cover housing 1. A central partition wall 33 having a bottom plate portion 32 with a projection 31 formed at its tip, a left side wall 34 and a right side wall 34 having receiving portions 33a formed on both left and right sides slightly below the upper end of the bottom plate portion 32, extending behind the bottom plate portion 32. , and the arm 6 protruding to the upper central rear portion of the upper lid housing 1 is locked above the rear end of the central partition wall 33 via a locking portion 6A at the lower end of the arm . forming a locking recess 35;
Engagement hole portions engaged with engagement protrusions 4 respectively formed in front of the left side wall 34 and right side wall 34A of the lower lid housing 30 and behind the outer surface of the left side wall 1B and right side wall 1C of the upper lid housing 1. forming a support plate portion 36 provided with 36A,
On the upper end of the left side wall 34 of the lower lid housing 30 and the upper surface of the receiving portion 33a projecting on the left side of the central partition wall 33, and on the upper end of the right side wall 34A and the upper surface of the receiving portion 33a provided on the right side of the central partition wall 33, the above-mentioned A pair of cover bodies 39 are arranged in parallel via a plurality of leg portions 33b so as to cover the rear end portion of the upper surface of each receiving portion 33a from above,
The end surface of the sleeve holder 20 is formed into a downward inclined surface 26 from the upper side to the lower side so that the upper side of the shutter plate 3 does not contact the sleeve holder 20 when the shutter plate 3 is opened and closed. become,
The shutter plate 3 is formed with notches 10 on the left and right upper sides thereof, and L-shaped ridges 3a protrude from the edges of the notch parts 10 on the left and right sides.
Therefore, in the closed state of the shutter plates 3, the ridges 3a are positioned on the inner side of the left side wall 1B in front of the pair of left and right openings 2 of the upper lid housing 1 and on the opposite side and the right side of the central partition wall 1D. The LC type is characterized in that the leaf springs 8 are held in contact with rear edges of locking walls 7A protruding from the inside of the wall 1C and on the opposite side of the central partition 1D. Adapter with 2-core shutter.

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